Charging compensation method of display panel and display device

By obtaining the current and previous grayscale values ​​of the sub-pixels of the display panel, combining the compensation table and weight index table, the initial compensation value and weight value of the sub-pixel are calculated, which solves the problem of uneven local charging of the display panel and realizes high-partition charging compensation and reduction of data storage.

CN117496905BActive Publication Date: 2025-10-17SUZHOU CHINA STAR OPTOELECTRONICS TECH CO LTD
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Patent Information

Application Number
CN202310074519.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-01-30
Publication Date
2025-10-17
Estimated Expiration
2043-01-30

AI Technical Summary

Technical Problem

Existing charging compensation methods cannot effectively support high-region charging compensation, resulting in uneven local charging of the display panel. Especially in the Trigate architecture, the reduced sub-pixel charging time leads to insufficient or overcharging. In addition, existing methods require a large amount of data storage and cannot achieve charging compensation.

Method used

A charging compensation method for a display panel is adopted. By obtaining the current and previous grayscale values ​​of a sub-pixel and combining it with a compensation table and a weight index table, the initial compensation value and weight value of the sub-pixel are calculated to achieve high-partition charging compensation and reduce data storage.

Benefits of technology

It achieves high-region charging compensation, improves the local charging unevenness problem of the display panel, reduces data storage requirements, and is suitable for display panels with different driving architectures.

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Abstract

The application provides a charging compensation method of a display panel and a display device. The charging compensation method of the display panel comprises the following steps: obtaining a current gray scale value of a sub-pixel and a previous gray scale value output by a data line connected with the sub-pixel; querying a compensation table according to coordinates of the sub-pixel in the display panel to obtain an initial compensation value of the sub-pixel; querying a weight index table according to the current gray scale value and the previous gray scale value to obtain a weight value corresponding to the sub-pixel; and calculating a compensated gray scale value of the sub-pixel according to the current gray scale value, the initial compensation value and the weight value. The application can perform high-partition charging compensation on the display panel, and improve the problem of local charging unevenness of the display panel.
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